When the photo features one person, the subject should be as far away from the background as possible. Inside, pull them away from walls, counters and other objects. Outside, pull them away at least 20 to 30 feet or more from buildings, bushes, etc.

Use a telephoto lens (at least 80 mm, but 150 mm to 200 mm will soften the background more effectively).

Use large f-stop to minimize depth of field f/5.6 or f/8 if possible.

Add fill flash to light the subject's face when necessary.

Avoid squinting by keeping subject's face out of direct sun.

Early morning or late afternoon sunlight is more interesting than midday.